3-7
CW FREQUENCY
OPERATION
One of the sweep generator’s major functions is to produce discrete
CW frequencies across the frequency range of the instrument. The fol-
lowing paragraphs describe how to place the 681XXA in the CW fre-
quency mode, select a CW frequency and power level for output, and
activate the CW ramp. Use the CW Frequency Mode menu map (Chap-
ter 4, Figure 4-2) to follow the menu sequences.
Selecting
CW Mode
To place the 681XXA in the CW frequency mode,
press the main menu key
CW/SWEEP
SELECT
At the resulting menu display, press
CW
. The CW
Menu (shown below) is displayed.
NOTE
When the sweep generator is reset, it
automatically comes up operating in the
CW frequency mode.
Selecting
a CW
Frequency
There are several ways to select a CW frequency for
output. You can (1) edit the current frequency, (2) en-
ter a new frequency, or (3) select one of the 20 pre-
set frequency parameters.
Editing the Current Frequency
Press
Edit F1
to open the frequency parameter,
then edit the current CW frequency using the cur-
sor control key or the rotary data knob. To close the
open frequency parameter, press
Edit F1
or make
another menu selection.
Entering a New Frequency
Press
Edit F1
to open the frequency parameter, then
enter the new CW frequency using the keypad and
appropriate terminator key. To close the open fre-
quency parameter, press
Edit F1
or make another
menu selection.
LOCAL (FRONT
CW FREQUENCY
PANEL) OPERATION
OPERATION
3-18
681XXA OM